Aviation Fuel in a high comp engine

[wvhippie]

I have a 415 sbc engine That has about 12.5 /1 comp. I would like to run it on the street and wondered if aviation fuel would be ok in it. I have been told yes and no. I have never used it but it is a lot cheaper than race fuel. :?

[hammertime]

There was a great post on yellowbullet and I'd never run the stuff in anything I have. I tried to find it and couldnt

[Tod74]

http://www.yellowbullet.com/forum/showthread.php?t=125553&highlight=AVIATION+FUEL

http://www.yellowbullet.com/forum/showthread.php?t=101873&highlight=AVIATION+FUEL

Here's two.

[TS1955]

About 14 years ago I lived 1 mile from an airport. I used to run aviation fuel 100LL (100 octane low lead) in a 13 to 1 BBC. Never had a bit of problem with it. Now I did have to go up (I think ) 2 jet sizes on my carb. Since 9-11 I don't know if they will still sell it to the public. If it's available to you, I wouldn't be afraid to run it in a 12.5 to 1 motor.

TS1955

[fla1976]

I used to run it as it was cheaper than race gas and ran without problems. It is still avaiable, but is harder to find. Find a small private airport, they usually have it. The airport here uses Shell Fuels.

[zipper06]

It'll run fine, but the octane is not tightly controlled, in most cases it's only guarenteed to be over 102, but it is illegal for someone to sell for street use.

Zip

[Tod74]

What is the difference between AV GAS and "CAR GAS"?

[fla1976]

Some info.

http://en.wikipedia.org/wiki/Avgas

[bbchevy]

Bottom LINE!
Its FINE,i also use to run it ALL the Time in my 468"Chevelle back in the Late 70's Ealy 80's.
BUT.....................?
I ALWAYS would add some Type of Leaded Fuel,or Lead Additive.Its VERY DRY.
Later
G 8)

[hammertime]

http://www.yellowbullet.com/forum/showthread.php?t=125553&highlight=AVIATION+FUEL

http://www.yellowbullet.com/forum/showthread.php?t=101873&highlight=AVIATION+FUEL

Here's two.


Still not the one I was looking for, someone took the time to explain what was missing in the stuff that makes it no good for us. I looked earlier today again and still couldnt find it. I do know a local used some and switched to torco 116 and picked up over a tenth 1/4

[itsabird]

i ran it back in the day so to speak, had no prob, always blended it with leaded fuel.

[fla1976]

David, is this the info you were looking for?
Couple more takes on it.

http://www.waterfordhills.com/results/aviation.pdf

http://www.thumpertalk.com/forum/archive/index.php/t-311517.html

[wvhippie]

Guys thanks for all the info. As always it has been a big help. :D

[kwkracing]

http://www.waterfordhills.com/results/aviation.pdf

All i got from that article was they want you to buy expensive gas so they tell you how bad av gas could be.

[fla1976]

I posted different views so everyone can read for themselves and decide what they want. I have run it and never had a problem. But, no matter what the subject, there is always another opinion. I never burned a valve or piston so I would run it again. I might've run better on race gas and been more consistent. The same goes with running alcohol. There are people that say it is hard on parts, but if you prepare the car for it's use you will probably be fine. When you take short cuts and don't think it through properly is when things go bad. JMO

[mopar1962]

pushing it at 12.5 to 1, if ya get caught somehow its a $25000 fine

[desoto30]

What is the difference between AV GAS and "CAR GAS"?

one of several/many differences is that av gas has an anti icing agent added to the fuel.